PVC hoses yog ntau yam thiab dav siv nyob rau hauv ntau yam lag luam rau lawv cov khoom zoo heev thiab pheej yig.Hauv tsab xov xwm no, peb yuav tshawb txog cov hauv paus ntawm PVC hoses, lawv daim ntawv thov, thiab lawv qhov zoo.PVC yog dab tsi?Polyvinyl chloride (PVC) yog ib qho khoom siv...
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